Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c771209213b2a30…

MALICIOUS

PDF

74.7 KB Created: 2021-03-09 17:07:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 437c10bcbecfc20486749f2165b46211 SHA-1: b7d32b9d809d06da2fc254ee7a4175fe8c94553c SHA-256: 9c771209213b2a304c79388b54bdfc36a817f141145882b75df18a28354ad248
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, characteristic of a link farm designed to manipulate search engine results or redirect users to potentially malicious sites. The presence of multiple disposable hosting domains and UTM parameters further suggests a phishing or spamming campaign. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious intent to direct users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/strik?utm_term=what+is+the+importance+of+social+justice+in+the+society PDF link annotation
    • http://expressvpn.store/feralewozezinilepaxutxz7n8.pdfIn PDF document text
    • https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/jokavinekimeni.pdfIn PDF document text
    • https://cdn.sqhk.co/kanemili/cYjhgjb/4237004410.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/rS0hjpV/vifuxilikawukojusisagake.pdfIn PDF document text
    • https://cdn.sqhk.co/kezomerameki/dpQ5tln/fudunolirikobonawesil.pdfIn PDF document text
    • http://bit7.top/air_force_ones_custom_dripo5jlq.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/nRiePji/emojination_2_level_21.pdfIn PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/2834752.pdfIn PDF document text
    • https://fudiditinip.weebly.com/uploads/1/3/1/4/131453724/a29b479d1f.pdfIn PDF document text
    • http://arendagg.xyz/40297393108o7kqo.pdfIn PDF document text
    • https://fanamavikere.weebly.com/uploads/1/3/4/6/134610997/tatelixasanela-tikevi.pdfIn PDF document text
    • http://ita-yog.space/english_worksheets_for_grade_1wxyfr.pdfIn PDF document text
    • http://coloradocustomelectric.com/multiplying_binomials_and_polynomial9eafi.pdfIn PDF document text
    • http://copyrightsupport-ig.com/binomial_theorem_worksheet_answer_keycoh64.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/uhjgcid/miluvexelizesar.pdfIn PDF document text
    • http://springwin.space/42413574693cack2.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/igPgfU9/tevibesobabexozinu.pdfIn PDF document text
    • http://livecopyrightverification.com/nejekegadekomanixolukeger32m2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://288c7b4b-0494-48f6-8ee2-9dd519b96b0a.filesusr.com/ugd/a107db_743791051178486ab145906a1f277ed0.pdf?index=trueIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_a73652b554f34f55a1d02c313c158be8.pdf?index=trueIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_80cffb70f3a04f1588ae43879c4ae0a0.pdf?index=trueIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_1f649ab9be314c51a3b6ca71b6f40854.pdf?index=trueIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_7f74ea78290841c389211687023da7ff.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57F 5444 bytes
SHA-256: 4f09356dff98fde175332b4266ec84bfc670320e6f7333c262abbc9729275188
font_01_sfnt_off0000f7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 11052 bytes
SHA-256: 8d6e36ba972e2b7e9ade6a773c79ac110ddd3f3bba68a792bb0406643b404ab3