Malicious PDF — malware analysis report

Static analysis result for SHA-256 2674e16577dddc51…

MALICIOUS

PDF

81.7 KB Created: 2021-03-14 12:23:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b7f919aafaefa9233985fd22a82dd70 SHA-1: d2e06e04e3b209c04930737c53ee8f15e0c0c190 SHA-256: 2674e16577dddc51877aaa5c8797a5f31db26baef11d78d5c308920753706f70
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous external links, suggesting a link farm for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier further confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=american+ways+2nd+edition+pdf
    • http://gosugas.getenjoyment.net/62617886833.pdf
    • https://rafomuvufeja.weebly.com/uploads/1/3/1/8/131856077/66917021fdc48b8.pdf
    • http://eslivdrug.space/zebonixuw7mna.pdf
    • http://nosilekexiwot.mywebcommunity.org/beers_medication_list_2020.pdf
    • http://biggymstoe.com/jasuvesaw366w8.pdf
    • https://bepevefobe.weebly.com/uploads/1/3/4/6/134699504/c2b3ece8e.pdf
    • https://tupopase.weebly.com/uploads/1/3/4/4/134471292/8575925.pdf
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/2065671.pdf
    • http://elinekici.online/sarkari_result_hssc_answer_keygkq8c.pdf
    • http://krokoboko3.xyz/lagune_1_kursbuch5r72d.pdf
    • http://moneyindia.site/6214899955kel06.pdf
    • http://biolinkus.me/can_i_check_a_lottery_scratch_tickets_online0xy8h.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_5ee0bbd9d5844f189b2d44c770959a10.pdf?index=true
    • http://rapuzezu.epizy.com/49124592839.pdf
    • http://liraperuwuw.atwebpages.com/35326066399.pdf
    • https://b2bd4247-5771-4f9a-9f3f-b46500bff287.filesusr.com/ugd/f41bfe_6a1621cfb2434298b671f3dac739720c.pdf?index=true
    • http://kagimotazife.epizy.com/introduction_to_finite_element_analysis_online_course.pdf
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_023b3c92343148978bd0bf55c2b36541.pdf?index=true
    • http://vorasokipat.rf.gd/cbre_cap_rate_report_q2_2019.pdf
    • https://6c473ef0-402e-45f0-9f95-6bc7e89a6a1a.filesusr.com/ugd/5518c3_7bac5b9dcf714fd38a45975e751c5aaa.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef9e.bin
91e90b16abe3a466d7c197308392faa76d3d86364d6397816d5c039d888ca5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9E 5372 bytes
font_01_sfnt_off000101d5.bin
f81a30386437eba601b6eacf346ba6d5dab47b0d58a951f010ea8330327980d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x101D5 12528 bytes
font_02_sfnt_off00012b66.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B66 4324 bytes

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