Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb9f6e3395f299c…

MALICIOUS

PDF

84.4 KB Created: 2021-05-06 11:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: df26109a6551dfad6f59f7a091a3e449 SHA-1: ab903768ab0affd739c9bbb9285e85b067750bff SHA-256: abb9f6e3395f299cdcce9a57d7743196916903b23cf5efebc0859a4adc571036
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, and is flagged by heuristics as a link farm and a potential phishing or malware distribution vector. The ClamAV detection and ML classifier further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • 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://xezojetit.ru/strik?utm_term=tintin+books+pdf+in+bengali PDF link annotation
    • https://cdn.sqhk.co/xotosira/gHidceO/73103021528.pdfIn PDF document text
    • http://masterpowerpoint.com/irregular_past_verbs_list_spanish11kzf.pdfIn PDF document text
    • http://aslixan.com/printable_1st_grade_reading_worksheetst5t1y.pdfIn PDF document text
    • http://shopeuro.pro/mifabitoxupovedenebogmjwl.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/tipipopegakaro.pdfIn PDF document text
    • https://fixubosadad.weebly.com/uploads/1/3/4/6/134658154/jolalilirozuw_vuvul_barejadasuv_besajise.pdfIn PDF document text
    • https://genolawibiwiz.weebly.com/uploads/1/3/4/3/134316454/sirudulotoxapopu.pdfIn PDF document text
    • http://datinge.site/noperit66ld.pdfIn PDF document text
    • https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/0983da2e1fa7d1.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/gchcghk/15584051574.pdfIn PDF document text
    • https://selotisatopus.weebly.com/uploads/1/3/1/8/131856190/lalexedegom_taruve_mavulababi.pdfIn PDF document text
    • http://subbellassecret.com/king_of_my_heart_guitar_chords_taylor_swifter40d.pdfIn PDF document text
    • https://cdn.sqhk.co/zelosoza/aWTmIgj/comedy_central_south_park_pandemic_special_live.pdfIn PDF document text
    • http://daimontimur.org/sims_3_for_mac_big_surw2wxx.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwovodegi/j3jfjbQ/effective_classroom_management_strategies_for_high_school_students.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/cgfYSgh/mejoxokufogodivexa.pdfIn PDF document text
    • http://antileqphh.site/what_is_environmental_impact_assessment_example2jzje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4f55877-8e48-4133-a411-e14586081e8b/what_is_meant_by_social_landscape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc844e4-41a7-4aa6-9f10-ed76b5f08f84/medieval_2_total_war_game_of_thrones_mod_crash.pdfIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_bf41e27a788c4a9bb81df1144ac0a182.pdf?index=trueIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_3401ab16fdbc4a6b92a56279a59c2df1.pdf?index=trueIn PDF document text
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_939a1524edbb4bd4b24c27bc8b84bf3a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0220815-2847-4b87-91ca-0333f80fd57a/jeguretus.pdfIn PDF document text
    • https://20e8ec16-a7ca-487e-906f-4b2d5c2744e2.filesusr.com/ugd/ab81b8_c39bf7f113d34233865c69b37f18c3be.pdf?index=trueIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_92ee000f3b124ef5a30684788df58827.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE161 5264 bytes
SHA-256: 2d28f192ecb3d4466de4b190fda29783930eb83b76322f1e6057c094e9711d4f
font_01_sfnt_off0000f358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF358 15088 bytes
SHA-256: 9f89617fcf2c1f950cd1368387764f974d2d7b81c6571c18693af5e9a86178a8
font_02_sfnt_off000120ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AD 10196 bytes
SHA-256: d421ea88919e682a6443856e75c5386acdf9b19f5d846e2bb8f241057b6902b9