Malicious PDF — malware analysis report

Static analysis result for SHA-256 7163064222a84495…

MALICIOUS

PDF

107.3 KB Created: 2021-04-04 10:22:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d415885f7369344627a9ffa58e7cee04 SHA-1: afb0009fb16bd8220e4c511f7359844cdc73b88a SHA-256: 7163064222a84495add986625ed263c7e8c1d306c562244183fe9b4f8c6bb931
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a 'download' button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/award?keyword=upkar+alp+psycho+book+pdf+download PDF link annotation
    • https://cdn.sqhk.co/golemejexeno/3ha49iN/baseball_9_cheats_ios.pdfIn PDF document text
    • https://jotevalosovem.weebly.com/uploads/1/3/4/3/134385082/004f11.pdfIn PDF document text
    • https://rijopadanag.weebly.com/uploads/1/3/1/0/131070137/xevijesop.pdfIn PDF document text
    • http://ditoterelutas.sportsontheweb.net/what_is_emphasis_in_interior_design.pdfIn PDF document text
    • https://wejigawavopon.weebly.com/uploads/1/3/4/3/134305277/8708052.pdfIn PDF document text
    • https://wabuxopimigom.weebly.com/uploads/1/3/4/0/134042903/015d5511dd3c.pdfIn PDF document text
    • https://sorasewemo.weebly.com/uploads/1/3/4/3/134358680/kepomuwarodof.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/56366691035.pdfIn PDF document text
    • http://juligum.22web.org/george_benson_billie_s_bounce.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/51f89b68c36cc.pdfIn PDF document text
    • https://cdn.sqhk.co/kizewetete/jbYgjac/hashtags_to_use_for_more_likes_on_instagram.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/rudobazikesedavolijod.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/zumusilu-kuteledixovikiz-fasarimi-nugumigikim.pdfIn PDF document text
    • http://gokawojop.scienceontheweb.net/doodle_art_tutorial.pdfIn PDF document text
    • https://tenojamerefu.weebly.com/uploads/1/3/1/8/131857247/vinadividubemeza.pdfIn PDF document text
    • https://velineninebag.weebly.com/uploads/1/3/4/6/134608195/9970736.pdfIn PDF document text
    • https://suwesinorilofev.weebly.com/uploads/1/3/4/0/134096988/8758373.pdfIn PDF document text
    • https://cdn.sqhk.co/foluxaziwaj/Lidjcha/90174797289.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/jeopardy_sheet_music_guitar.pdfIn PDF document text
    • http://rebikesumusosu.rf.gd/avid_eleven_rack_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/hello_anaganaga_oka_ooru_video_song.pdfIn PDF document text
    • http://wegamaluperetuj.atwebpages.com/atlas_of_minerals_in_thin_section.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/how_to_invest_money_in_indian_share_market.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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B4 5176 bytes
SHA-256: 4ceb63bbe856188eac35e0df50829b27b0446a2b04c82b4fb812427bee877093
font_01_sfnt_off0001283d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283D 3720 bytes
SHA-256: d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281
font_02_sfnt_off000133a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A1 11032 bytes
SHA-256: c66ef0bdaf59ae27fd8b879466fb940457ccda128ea412c2f81b7edafcce4f0d
font_03_sfnt_off00015950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15950 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
font_04_sfnt_off00016752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16752 18488 bytes
SHA-256: 9901455a00a3cfec1ff24becac21eab33e9f434cbf641a0ae97859284748d645