Malicious PDF — malware analysis report

Static analysis result for SHA-256 faefb28be36f2418…

MALICIOUS

PDF

98.1 KB Created: 2021-03-09 16:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6e30d435abd6e1c491c8ab2e861772e0 SHA-1: 8baa04e5acd631d200413cb622d02288824a2738 SHA-256: faefb28be36f2418cab0534825a9305259223cbe849244fa2f8e55b2e3a9505c
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The 'SE_PAYMENT_REDIRECT_LURE' heuristic suggests a business email compromise pattern, although the document body itself appears to be garbled. The presence of external URIs and a link farm on disposable hosting further supports a malicious phishing or redirection attempt, likely to trick users into downloading malware disguised as a flashlight app.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://resalured.ru/wix?keyword=flashlight+apk+free+download PDF link annotation
    • http://roralukomoko.22web.org/imperialismo_europeu.pdfIn PDF document text
    • https://nusewumu.weebly.com/uploads/1/3/2/7/132740482/93e4e.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/ieiyhhF/33941157516.pdfIn PDF document text
    • http://899themes-demo.ru/69150252825u358e.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/d6bhfja/christmas_bingo_cards_for_adults.pdfIn PDF document text
    • https://virefogagivagu.weebly.com/uploads/1/3/0/8/130815228/wegedomono-jonikijigepe-wisorujadezuk.pdfIn PDF document text
    • http://spoonnumberone.xyz/jisuxulukoxotempybjx.pdfIn PDF document text
    • http://rodopopenusunuv.iblogger.org/dell_studio_xps_8300_desktop.pdfIn PDF document text
    • http://opros.xyz/2005_nissan_pathfinder_for_sale_craigslist2x41f.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/magnet_sheet_near_meyvsur.pdfIn PDF document text
    • https://bopexetijajab.weebly.com/uploads/1/3/1/4/131411078/8120904.pdfIn PDF document text
    • http://spainwow.pro/2017_rzr_1000_clutch_rebuild_kitgbi33.pdfIn PDF document text
    • http://meetly.space/2478072644r14nw.pdfIn PDF document text
    • https://lurusavi.weebly.com/uploads/1/3/2/7/132710630/rimixiv.pdfIn PDF document text
    • https://gitapelo.weebly.com/uploads/1/3/2/6/132682700/rajoj.pdfIn PDF document text
    • https://cdn.sqhk.co/fusexabuvej/big3iel/virgin_pulse_max_buzz_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/iajgEhh/rusazolam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/981b9811-dfa7-4e4b-b973-bcd84baebd5e/kafaxoxibonivep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9e360a9-519b-4570-b5aa-f36f30af6dde/baxawirotelub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857f8420-1669-46f5-a49a-9e8e65059fbd/aircare_humidifier_filter_maf2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03647081-99e3-42ed-b0c0-5c5a15f442f4/best_zecharia_sitchin_books.pdfIn PDF document text
    • http://sefogozi.epizy.com/snap_on_1_2_digital_torque_wrench_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c786837c-a71c-4066-82e6-e589f909a6d9/mansion_on_the_hill_bruce_springsteen_meaning.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE68 6440 bytes
SHA-256: 3d4760ca295192c89086870ebbac49c5a5945404ea6ab57fca452cf2db5f569a
font_01_sfnt_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 3276 bytes
SHA-256: d0ae4ee1b4d417e8e5621aef4e58dd997b01497e1616e2347d082d2b2aad6764
font_02_sfnt_off0000f974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF974 5412 bytes
SHA-256: 78b43b42f4d3ade837897eff969a0fbe5dbd8e014478cd4d96df307c9e0a2cae
font_03_sfnt_off00010be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE6 13952 bytes
SHA-256: 869b46dc53d2f9871f69e13f022bb7483b8f9c1ebb3e2d64b923d74c53068b30
font_04_sfnt_off000138bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138BB 10408 bytes
SHA-256: 5a90acbf13dc78bc93be6b7c5dadff8314d787eeb0a51b0bc97efd3f6768993c
font_05_sfnt_off00015c8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C8C 16148 bytes
SHA-256: dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06
font_06_sfnt_off0001718a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1718A 1736 bytes
SHA-256: 0d9b6ab0354368cdfa5a4e52e4dfb250ede80cec4283e48fafec0a3c1c1d30df

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