Malicious PDF — malware analysis report

Static analysis result for SHA-256 1100baf26f8c3ce3…

MALICIOUS

PDF

110.5 KB Created: 2021-04-02 12:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75fc0de2a0387b211c4606b1ff61195b SHA-1: 97d540f796da759708322a989b19981da068062d SHA-256: 1100baf26f8c3ce39e52bf29c91d40d945c3403c78abe069147fb65dc09a0c9d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other file-hosting services, indicating a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=giorgio+agamben+potentialities+pdf
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/tajufanapa.pdf
    • https://domilejoxu.weebly.com/uploads/1/3/4/5/134529458/5deb8.pdf
    • https://cdn.sqhk.co/rawegili/gUzDN7X/53686221611.pdf
    • https://bupekotarox.weebly.com/uploads/1/3/0/7/130739944/rawofaj-pisojobino-kamur-nuwuwor.pdf
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/xanimakipukofun.pdf
    • https://cdn.sqhk.co/gonolesuzam/b3Yjjhb/81451489269.pdf
    • https://nedotumawu.weebly.com/uploads/1/3/4/6/134626041/soxibipuvezodip.pdf
    • http://dkshlyap.ru/american_ninja_warrior_apkqc0e1.pdf
    • http://anarchymedya.com/reflection_mulan_piano_sheet_music7opl2.pdf
    • https://veliwomi.weebly.com/uploads/1/3/5/3/135343105/4509020.pdf
    • https://pogipusuzifu.weebly.com/uploads/1/3/4/8/134869227/sudomef_tujezatakewip_suweb.pdf
    • http://badgesverified.com/623828493148xyeg.pdf
    • https://cdn.sqhk.co/sedasolegov/T9x79gh/times_square_church_choir_songs.pdf
    • https://lupenasax.weebly.com/uploads/1/3/4/7/134738003/a97fc8ef40332.pdf
    • https://cdn.sqhk.co/lufezeralon/gjdgggc/jizipag.pdf
    • http://daating19.site/par_q_test_acsmea7eh.pdf
    • https://cdn.sqhk.co/pajerelo/Xjicjbt/nfl_schedule_week_3_odds.pdf
    • http://prizinsta365.website/why_is_gluten_free_food_bad_for_youe0r73.pdf
    • https://salotoniv.weebly.com/uploads/1/3/5/3/135305201/wixubetojupefis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_15ac6f8f6ba245acb3bfd6ccf65f2d76.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e80c232c-42d5-488e-b504-768129ad12de/13836477743.pdf
    • https://uploads.strikinglycdn.com/files/92c4c8df-e54f-4db9-8ce1-f294f17b4283/pathfinder_druid_feats.pdf
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_a44ffa5ef7384d4eb4728fbb0d8eda81.pdf?index=true
    • https://uploads.strikinglycdn.com/files/03c20923-2ccf-4a5a-a9ac-17f0685e4b3a/xuwawuxumubajixujige.pdf
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_f298603df22141818ccbcaf33ba53818.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2dbb432d-0da2-4765-b7e5-1d5dfbe03a49/samsung_50mu6120_50_inch_4k_uhd_smart_tv_with_hdr_review.pdf
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_7675b9819fe64721aafdc7474b5929ab.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017382.bin
46cf2bdf4d8026fa622b05132b39cd600e9f4404d4452b245bc7ce6423d7e181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17382 5532 bytes
font_01_sfnt_off00018638.bin
50e6a82d453e1b53a3b34a225ddcc53e79d5031f8adbafaf5f6928e3c086b362		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18638 11432 bytes

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