Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7aa85a7e869f4bd…

MALICIOUS

PDF

74.6 KB Created: 2021-03-11 00:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a25fcf6d5474c27ca12ce52f9ee55243 SHA-1: 1490d78ea6843cccd29a00a83c77da2d6287edae SHA-256: c7aa85a7e869f4bd26f2204025e70193e03796bdd09838302dee23a89a22e222
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with high-confidence heuristics indicating it's a phishing lure. The document body and embedded URLs suggest a phishing attempt disguised as a free download related to an 'Einstein biography in bengali pdf'. The presence of multiple unknown URLs indicates potential redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xajibur.ru/award?keyword=einstein+biography+in+bengali+pdf PDF link annotation
    • http://dizititakozazi.mywebcommunity.org/10396134704.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/shark_swivel_180_sonic_duo_scrubbing.pdfIn PDF document text
    • http://mexuloxuxinona.iblogger.org/azure_blob_storage_speed.pdfIn PDF document text
    • http://xarapover.mygamesonline.org/what_is_management_in_business_organization.pdfIn PDF document text
    • http://epaytds.xyz/free_android_emulator_lite7pgll.pdfIn PDF document text
    • http://tonemisi.medianewsonline.com/sportcraft_tx_5.0_rc_treadmill_review.pdfIn PDF document text
    • http://madewithsunshine.com/kipesuk2g8ep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/application_form_for_uwc_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b7870e-7694-43da-9428-353364af30a5/joxosadivaxewabuxisafuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bab08d9-007b-4b19-aa05-de3687194ce0/zekatavezamuwadixirerida.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/pasedokixogodula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd150b9-24d1-4dc6-adec-4ca908b1b9b1/guitar_chord_chart_for_left_handers.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/fumaxolovilosajopurukegu.pdfIn PDF document text
    • http://fipepazis.epizy.com/medegazizirewulavapasep.pdfIn PDF document text
    • http://kagibog.epizy.com/how_to_clean_simplehuman_soap_dispenser.pdfIn PDF document text
    • http://bodirinukamole.onlinewebshop.net/common_mistakes_in_spoken_english.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/zepotajedawabowozati.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/nijeliwizaxeduvizozolajew.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/12531166532.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD470 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off0000e555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE555 5500 bytes
SHA-256: d83a839c0cf0f4ccc3ddaa87436b01cf9d4eafb65218818d4a5d7714465fcb40
font_02_sfnt_off0000f80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80C 10300 bytes
SHA-256: 9644c8e3917958f25921b2ae4e17339fd5505e2b22a6be03883b0ee70afa0420

Open this report in the interactive analyzer, or submit your own file for analysis.