Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb5d20f7a28a7506…

MALICIOUS

PDF

79.1 KB Created: 2021-05-17 10:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b3f1d4838d36ecc179c0656015f60e7 SHA-1: 59d8be31769d777dbfa7e0fe6ebdfdc8f1ce2e46 SHA-256: cb5d20f7a28a7506368563db9731c744b8bf99c30fb7a79c35b86eaa6e491262
136 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, using lures related to lotteries or prizes and parcel delivery requirements. The presence of external URIs and the ML classifier flagging it as malicious strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://fokemale.ru/strik?utm_term=atlas+copco+oil+free+compressor+price
    • https://cdn-cms.f-static.net/uploads/4497685/normal_5fd61eb9bc123.pdf
    • http://pobopel.iblogger.org/wematagamatedir.pdf
    • https://static.s123-cdn-static.com/uploads/4366337/normal_5fe3f85b50219.pdf
    • http://bejawutipage.mywebcommunity.org/71932210681.pdf
    • http://serikanipesemo.iblogger.org/intestinal_obstruction_management.pdf
    • http://xibipumazanepir.iblogger.org/66096674671.pdf
    • https://cdn-cms.f-static.net/uploads/4367665/normal_606e8237b5b6c.pdf
    • http://nuwojukow.mygamesonline.org/yoga_asanas_postures_free_download.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xufaxoferugod/kenmore_coldspot_106_ice_maker.pdf
    • https://s3.amazonaws.com/jixeremipet/non_verbal_reasoning_meaning_in_marathi.pdf
    • http://zuxorijafofonal.rf.gd/nebune.pdf
    • http://gutekuretejapoj.onlinewebshop.net/kolifonoram.pdf
    • https://s3.amazonaws.com/jobavo/ubuntu_server_16._04_intel.pdf
    • http://wisokokeg.epizy.com/sedona_method_release_technique.pdf
    • http://nidubopavoxu.rf.gd/asus_m4a785td-v_evo_specifications.pdf
    • http://zepotusetazokor.rf.gd/gawewi.pdf
    • http://finosumu.rf.gd/whirlpool_dishwasher_wdf520padm_manual.pdf
    • https://s3.amazonaws.com/genukopapovixo/gefosu.pdf
    • https://s3.amazonaws.com/fajujiju/56736765759.pdf
    • http://medesawawolujim.epizy.com/49830477045.pdf
    • http://gefuxuxoj.epizy.com/abnormal_psychology_dsm_5_update_edition_8th.pdf
    • https://s3.amazonaws.com/murudute/rokerexuvurugo.pdf
    • http://kususen.myartsonline.com/16988558846.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f3.bin
9d057cc913368e3cb3634bd1abe43e4fa670966c47f4db60e253c4680cf5262f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F3 5152 bytes
font_01_sfnt_off00010566.bin
dda724b167c9c8d28ee1482adce6633a62cbafda62f0a2a476452d598a31f877		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10566 11780 bytes

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